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| ©iStockphoto/Eugeny Shevchenko |
| While normal infants make the transition to walking on two legs in a relatively short period, some members of a recently discovered group of families continued to move on their palms and feet and never walked upright. |
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| ©UC Berkeley |
| Electron microscope image of budding yeast, Saccharomyces cerevisiae. UC Berkeley researchers insert variants of human enzymes into yeast to see if these enzymes can be tuned up with vitamins. |
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| ©NASA/JPL-Caltech/Univ. of Wisconsin |
| More than 800,000 frames from NASA's Spitzer Space Telescope were stitched together to create this infrared portrait of dust and stars radiating in the inner Milky Way. |
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| ©NASA/JPL-Caltech |
| Using infrared images from NASA's Spitzer Space Telescope, scientists have discovered that the Milky Way's elegant spiral structure is dominated by just two arms wrapping off the ends of a central bar of stars. Previously, our galaxy was thought to possess four major arms. |
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| ©NASA/JPL-Caltech/University of Arizona/ Science |
| A false-color image shows the supernova remnant Cassiopeia A. The picture combines infrared data from the Spitzer Space Telescope (red), visible data from the Hubble Space Telescope (yellow), and x-ray data from the Chandra X-Ray Observatory (green and blue). |
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| ©Paola Negri/Sergio Petronilli/ENEA |
| The cuneiform tablets housed in Iraq document how people lived for millennia in ancient Mesopotamia. They describe codes of law, treatises and economic transactions, from the beginning of writing, around 3350 B.C., until the end of the pre-Christian era. |
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| ©Space.comn |
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| ©Unknown |
| Cleaning a vacuum spatial filter for the Vulcan Petawatt Facility during its construction |
